Steam-trap.



No. 755,251. PATENTED MAR. 22, 1904 S. STEINMITZ.

STEAM TRAP.

APPLIUATION FILED D110. 24, 190s.

-NO MODEL 50 20 7 I Z rfrrlrrrvmr g. o gmlmmm A\ ullu/ ummm No.I755,251.

UNITED ,STATES Patented March 22, 1904.

PATENT OFFICE.'-

STEAM-TRAP.

SPECIFICATIQN fqrming part of Lettersratent No. 755,251, dated March 22,1904.

l Application led December 24,1903. Serial No. 186,421. (No model.) i ITo a/ZZ whom t may concern:

Be it known that I, SEBASTIAN STEINMITZ, a citizen of the United States,residing at Scranton, in the county of Lackawanna and State ofPennsylvania, have invented certain new and useful Improvements inSteam-Traps, of which the following is a specification.

This invention relates to steam-boilers, and particularly to that classthereunder known as traps An object of the invention is to provide novelmeans for preventing the too rapid return of the valve after the saidvalve has been unseated in the usual manner-viz. through the buoyancy ofa float carrying the valve. In traps where the float rises and fallswith the level of the water it is apparent that as the valve unseatswhen the iioat is lifted a very small degree `the said valve will alsobe seated when the oat recedes a very small degree. To overcome thistendency of the float to seat the valve with avery small discharge ofwater. I have provided novel means for retarding the descent of thefloat, thereby permitting a greater or less period of discharge of thewater, according tothe adjustment of the controlling device, anotherobject ofthe invention beingV to provide novel means for effecting thesaid adjustment.

Furthermore, an object of the invention is to .provide a steam-trap ofthe character noted in which the retarding means areoutside of thecasing, in view and accessible to the operator for the purpose ofpermitting the adjustment of the parts and for otherwise attending tothe renewal or repair of parts.

Finally, an object of the invention is to provide a steam-trap of thecharacter noted which will possess advantages in points of efciency anddurability and proving at thesame time comparatively inexpensive toproduce and maintain. I

With the foregoing and other objects in view the invention consists inthe details of construction and in the arrangement and cornbination ofparts to be hereinafter more fully set forth and claimed.

Y In describing the invention in detail reference will be had to theaccompanying drawings, forming part of this specification, whereinlikecharacters denote corresponding parts Yin the several views, and. inwhich- Figure 1 is a sectional view ofa steam-trap casing with the floatand the operative parts thereof in elevation. Fig. 2 is a plan view, andFig. 3 is a detail view, showing a modified means for holding the dogs.

In the drawings, 1 denotes a casing having suitable legs 2 of anypreferred form or construction. The bottom of the casing'is providedwith a threaded orifice 3 for the reception of the drain-cock 4.. In thebottom of the casing and approximately centrally thereof is a threadedopening 5 to receive the nipple 6 of the valve-casing 7. Thevalve-casing has a seat for the valve 8, and the valve 8 is guided inthe hollow portion of the nipple by means of the wings 9, three or moreof which are provided for the purpose of retaining the valve-stem 10 inalinem'ent with the opening in the nipple. rIhe valve-casing is providedwith a drain-opening 11, which may be discharged to any convenientpoint.

The ioat 12 carries the valvefstem 10in its rise and fall, and with itsdescent the valve is lseated and with its ascent the valve is unseated.vWater-gages 13 are provided in order to vtest theheight of the waterwithin the chamber.

A pipe 14 is tapped or otherwise connected to the wall of the chamberand is known as the inlet-pipe for the ingress of steam or Water. A vent15 is provided in the top of the casing, and centrally of the top Iprovide a stuffing-box 16, having a nipple 17 threaded in the said top.A stern 18 is secured in the top of the oat and extends through thestuifing-boX and terminates at the top in a head 19, larger in diameterthan the stem, but being oppositely beveled from its center to thestemand toward the outer end. By reason of Athe tapering walls of the headtwo lcams 2() vand 21 are produced.

Mounted on the casing is a yoke or standard 22, each side of whichl hasa slot 23, in which the dogs 24 are pivoted. The dogs have lintegralarms 25, which extend at right angles to the dogs proper and havescrew-threaded surfaces for the reception of the threaded weights 26,which are adjustable on the thread- IOO ed arms to Vary their distancefrom the pivots 27 of the dogs, the said pivots having bearings in thestandard or yoke 22.

rIhe lower ends ofthe dogs are beveled upwardly, as at 28, to engage thecamming-surface 21 of the head. At the termination of the beveledsurfaces 28 the said dogs have a more abrupt eamming-surface 29, withhoolilike extensions 30 at the junction of the surfaces 28 and 29.

In operation as the condensed steam iiows into the casing of the trapand accumulates to a suiiicient height to lift the Hoat thecamming-surface 2l of the head rides over the beveled surface 28 of thedogs and forces the said dogs apart until the head at its largest pointpasses the hook-like extensions 30 and the said extensions pass underthe enlarged portion of the head. The weights tend to force the two dogstogether, and as the large portion of the head passes the hook-likeextensions 30 the said extensions are pressed into engagement with thecamming-surface 20 of the said head, thereby tending to prevent thedescent of the oat to a certain degree, the degree depending upon therelation of the weights to the pivots of the dogs.

As has been stated, the float in ordinary devices may return to seat thevalve when only a small amount of water has escaped from the trap; butwith this invention the dogs sustain a certain amount of the weight ofthe ioat and said oat is prevented from descending until suicient waterhas escaped from the casing. It is of course necessary that theadjustment be such that the weight of the fioat will overcome thetendency of the weights A when a predetermined amount of water is passedfrom the casing and the float lacks support from the interior; but thedegree of support required from within is varied, as stated by theadjustment of the weights.

In the modification shown in Fig. 3 I dispense with the weights and alsodo away with the threaded extensions of the dogs, and in place thereof Iutilize springs A, having their ends secured to the yoke or standard,with their ends bearing against the dog to press them normally inwardly.It is my purpose to have the flat portions B of the springs slotted inorder that they may be adjusted to engage the dogs near their points ornearer their pivots, according to the pressure required to be exerted toovercome the tendency of the ioat to descend.

If desired, the device for holding the ioat may be placed within thecasing.

The construction, operation, and advantages will,it isthought,beunderstood from the foregoing description, it being noted thatvarious changes may be resorted to in the proportions and details ofconstruction for successfully carrying the invention into practicewithout departing from the scope.

Having fully described the invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a steam-trap, a easing, suitable inlet and outlet openingstherein, aiioat in the casing, astem projecting upwardly from the oat,dogs for engaging the stem to retard the descent of the ioat during therecession of the water.

2. In a steam-trap, a casing, suitable inlet and outlet openingstherein, a float in the casing, a stem on the iioat projecting upwardly,an enlargement on the stem having a double camming-surface, and dogsengaging the enlarged portion to retard the descent of the ioat duringthe recession of the water.

3. In a steam-trap, a casing, suitable inlet and outlet openingstherein, a float in the casing, a stem projecting upwardly therefrom, anenlargement on the stem having a double camming-surface, dogs forengaging the enlargement to retard the descent of the float during therecession of the water and means for holding the dogs in engagement withthe enlargement.

4. In a steam-trap, a casing, suitable inlet and outlet openingstherein, aiioat in the casing, a valve carried by Athe iioat, wings forguiding the Valve, a stem projecting upwardly from the float, anenlargement on the stem having a double camming-surface, dogs forengaging the enlargement to retard the descent of the ioat during therecession, of the water.

In testimony whereof I affix my signature in presence of two witnesses.

SEBASTIAN STEINMITZ Witnesses: f

GEORGE EDWARDS, D. B. REPLOGLE.

